Device for accelerating gas replacement in sealed cabin

Abstract

The utility model discloses a device for accelerating gas replacement in a sealed cabin, which comprises an air bag arranged in the sealed cabin and provided with an air inlet and an air outlet which extend to the outside of the sealed cabin; the replacement inlet and the replacement outlet are formed in the sealed cabin; the air bag is arranged in the sealed cabin, air in the sealed cabin is driven away by inflating and expanding the air bag, and therefore the use amount of inert gas is reduced in the gas replacement process, and the gas replacement time is shortened in the gas replacement process.

Description

Technical Field

[0001] The utility model belongs to the technical field of sealed cabin gas replacement, and more specifically relates to a device for accelerating gas replacement in a sealed cabin. Background Art

[0002] In the fields of aerospace and military industry, sealed cabins are extensively welded with titanium alloys and stainless steel materials. Due to the very high requirements for weld quality, an inert gas shielded cabin is usually used for welding.

[0003] The test method for sealed chamber leaks requires measuring the chamber's leakage rate. The oxygen content method is used to measure very low leakage rates, which has the advantage of being less sensitive to temperature and pressure changes. This method relies on the increase in oxygen concentration within the sealed chamber after it has been purged with an inert gas as a function of time. The purpose of purging the sealed chamber with inert gas is to reduce the residual oxygen concentration within the chamber to a level compatible with the leak rate being measured.

[0004] For large sealed chambers containing precision instruments, drive mechanisms, and auxiliary operating structures for personnel, an inert gas replacement method is required. Large sealed chamber replacement requires a large amount of inert gas, and the inert gas flow rate must be controlled within a certain range. Excessive inert gas flow can cause gas turbulence and cause the inert gas to be discharged through the outlet. Therefore, the entire gas replacement process requires a large amount of inert gas and a long replacement time to reduce the residual oxygen concentration in the sealed chamber to a level that matches the leak rate to be measured. Utility Model Content

[0005] The purpose of the utility model is to address the deficiencies in the prior art and provide a device for accelerating the replacement of gas in a sealed cabin. An airbag is arranged in the sealed cabin, and the air in the sealed cabin is driven out by inflating the airbag, thereby reducing the amount of inert gas used and the duration of the gas replacement process.

[0006] In order to achieve the above object, the utility model provides a device for accelerating gas replacement in a sealed cabin, the device comprising:

[0007] An airbag is disposed in the sealed cabin, and is provided with an air inlet and an air outlet extending to the outside of the sealed cabin;

[0008] The replacement inlet and the replacement outlet are arranged on the sealed cabin.

[0009] Optionally, one side of the airbag is mounted on the inner wall of the sealed cabin via a mounting plate.

[0010] Optionally, the shape of the airbag matches the shape of the inner cavity of the sealed cabin.

[0011] Optionally, the air inlet and the air outlet are arranged on the top of the sealed cabin, and flanges and valves are provided on the air inlet and the air outlet.

[0012] Optionally, the replacement inlet and the replacement outlet are respectively arranged at the bottom and the top of the sealed cabin, and the replacement inlet and the replacement outlet are respectively used to connect to an inert gas input pipeline and an inert gas output pipeline.

[0013] Optionally, a flow meter is further included, and the flow meter is used to detect the input flow of the inert gas.

[0014] Optionally, a gas oxygen content detector is further included, and the gas oxygen content detector is arranged in the sealed cabin.

[0015] The utility model provides a device for accelerating gas replacement in a sealed cabin, which has the following beneficial effects:

[0016] 1. By installing an airbag in the sealed cabin and inflating the airbag to drive out the air in the sealed cabin, the amount of inert gas used and the duration of gas replacement can be reduced during the gas replacement process;

[0017] 2. By matching the shape of the airbag with the shape of the inner cavity of the sealed cabin and utilizing the flexibility of the airbag, the inflated airbag can occupy the space of the inner cavity of the sealed cabin as much as possible, thereby minimizing the amount of inert gas used and the duration of gas replacement during the gas replacement process.

[0018] Other features and advantages of the present invention will be described in detail in the subsequent detailed description of the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and other objects, features and advantages of the present invention will become more apparent through a more detailed description of exemplary embodiments of the present invention in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the present invention.

[0020] Figure 1 The figure shows a schematic structural diagram of a device for accelerating gas replacement in a sealed cabin according to an embodiment of the present utility model.

[0021] Description of reference numerals:

[0022] 1. Airbag; 2. Sealed cabin; 3. Air inlet; 4. Air outlet; 5. Displacement inlet; 6. Displacement outlet; 7. Flow meter. DETAILED DESCRIPTION

[0023] The following describes preferred embodiments of the present invention in greater detail. Although preferred embodiments of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. Rather, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0024] The utility model provides a device for accelerating gas replacement in a sealed cabin, the device comprising:

[0025] An airbag is arranged in the sealed cabin and is provided with an air inlet and an air outlet extending to the outside of the sealed cabin;

[0026] The displacement inlet and the displacement outlet are arranged on the sealed cabin.

[0027] Specifically, the airbag is an airtight airbag with no leak points. Before the sealed cabin is checked for leaks, the airbag is inflated to expand it, occupying the internal space of the sealed cabin for gas replacement in the sealed cabin, and then the sealed cabin is replaced with inert gas through the replacement inlet and replacement outlet, thereby improving the replacement efficiency and shortening the replacement time without affecting the gas composition in the sealed cabin.

[0028] Optionally, one side of the airbag is mounted on the inner wall of the sealed cabin through a mounting plate.

[0029] Specifically, the airbag is in a contracted state in an initial state, closely attached to the mounting plate, and does not occupy too much space in the sealed cabin.

[0030] Optionally, the shape of the airbag matches the shape of the inner cavity of the sealed cabin.

[0031] Specifically, by matching the shape of the airbag with the shape of the inner cavity of the sealed cabin and utilizing the flexibility of the airbag, the inflated airbag can occupy the space of the inner cavity of the sealed cabin as much as possible, thereby minimizing the amount of inert gas used and the duration of gas replacement during the gas replacement process.

[0032] Optionally, the air inlet and the air outlet are arranged on the top of the sealed cabin, and flanges and valves are provided on the air inlet and the air outlet.

[0033] Specifically, the air inlet is used to connect to an inflation device, which can inflate the airbag, and the inflation gas can be an inert gas.

[0034] Optionally, the replacement inlet and the replacement outlet are respectively arranged at the bottom and the top of the sealed cabin, and the replacement inlet and the replacement outlet are respectively used to connect to the inert gas input pipeline and the inert gas output pipeline.

[0035] Specifically, the replacement inlet and the replacement outlet are respectively arranged at the bottom and the top of the sealed cabin, and the inert gas is input upward from the bottom and the original gas in the sealed cabin is discharged from the top to achieve gas replacement.

[0036] Optionally, a flow meter is further included, and the flow meter is used to detect the input flow of the inert gas.

[0037] Specifically, the input flow rate of the inert gas is detected by a flow meter, so that the replacement flow rate of the inert gas can be controlled according to the detection of the input flow rate, thereby avoiding waste of the inert gas caused by excessive flow rate.

[0038] Optionally, a gas oxygen content detector is further included, and the gas oxygen content detector is arranged in the sealed cabin.

[0039] Specifically, the progress of gas replacement can be accurately judged based on the detection results of the gas oxygen content detector.

[0040] The device for accelerating gas replacement in a sealed cabin provided by the present invention comprises the following steps:

[0041] An air bag is provided in the sealed cabin;

[0042] Inflating the airbag to expand it;

[0043] Open the displacement outlet and input inert gas into the sealed chamber.

[0044] Specifically, when the sealed cabin is replaced with inert gas, the air inlet is opened to inflate the airbag to make it expand. After the airbag expands to its maximum outer volume, the air inlet is closed, and the replacement inlet and replacement outlet on the sealed cabin are opened to carry out inert gas replacement. After the replacement is completed, the air outlet is opened to quickly exhaust the airbag, and the inert gas in the cabin compresses the airbag, causing the airbag to return to a contracted state. After the airbag retracts and the inert gas in the sealed cabin stabilizes, the air inlet, replacement outlet and ventilation inlet are closed.

[0045] Furthermore, when the airbag is inflated to a state matching the shape of the inner cavity of the sealed cabin, the air inlet and the air outlet are closed.

[0046] Specifically, a pressure sensor is provided in the airbag or an airbag flow meter is used to detect the fullness of the airbag, which can conveniently determine the inflation degree of the airbag.

[0047] Furthermore, it also includes:

[0048] The oxygen content of the gas in the sealed cabin is detected by using a gas oxygen content detector arranged in the sealed cabin;

[0049] When the oxygen content of the gas is within the set threshold range, the gas outlet is opened.

[0050] Specifically, during the gas replacement process, the flow meter detects the flow of inert gas to avoid excessive flow causing gas turbulence and thus waste of inert gas. After a period of replacement, when the gas oxygen content detector reaches the set threshold range, the air outlet airbag is opened to quickly exhaust the gas, and the inert gas in the cabin compresses the airbag, causing the airbag to return to the contracted state.

[0051] Example

[0052] like Figure 1 As shown, the utility model provides a device for accelerating gas replacement in a sealed cabin, the device comprising:

[0053] The airbag 1 is arranged in the sealed cabin 2 and is provided with an air inlet 3 and an air outlet 4 extending to the outside of the sealed cabin 2;

[0054] The replacement inlet 5 and the replacement outlet 6 are arranged on the sealed cabin 2 .

[0055] In this embodiment, one side of the airbag 1 is mounted on the inner wall of the sealed cabin 2 via a mounting plate.

[0056] In this embodiment, the shape of the airbag 1 matches the shape of the inner cavity of the sealed cabin 2 .

[0057] In this embodiment, the air inlet 3 and the air outlet 4 are arranged on the top of the sealed cabin 2 , and flanges and valves are provided on the air inlet 3 and the air outlet 4 .

[0058] In this embodiment, the displacement inlet 5 and the displacement outlet 6 are respectively provided at the bottom and the top of the sealed cabin 2 , and the displacement inlet 5 and the displacement outlet 6 are respectively used to connect to the inert gas input pipeline and the inert gas output pipeline.

[0059] In this embodiment, a flow meter 7 is further included, and the flow meter 7 is used to detect the input flow rate of the inert gas.

[0060] In this embodiment, a gas oxygen content detector is also included, and the gas oxygen content detector is arranged in the sealed cabin 2.

[0061] In summary, when the device for accelerating gas replacement in a sealed cabin provided by the present invention is used, an airbag 1 is set in the sealed cabin 2. Before starting gas replacement, the sealed cabin 2 is closed, the air inlet 3 and the air outlet 4 are closed, and the airbag 1 is in a contracted state and closely attached to the mounting plate, so as not to occupy too much space in the sealed cabin 2. Then, the air inlet 3 is opened to inflate the airbag 1 to expand it. After the airbag 1 expands to its maximum outer volume, the air inlet 3 is closed, and the replacement inlet 5 and the replacement outlet 6 on the sealed cabin 2 are opened to perform inert gas replacement. The flow meter 7 detects the flow rate of the inert gas. After a period of replacement, when the gas oxygen content detector reaches the set threshold range, the air outlet 4 is opened to quickly exhaust the airbag 1. The inert gas in the sealed cabin 2 compresses the airbag 1, causing the airbag 1 to return to a contracted state. After the airbag 1 retracts and the inert gas in the sealed cabin 2 stabilizes, the air inlet 3, the replacement inlet 5 and the replacement outlet 6 are closed.

[0062] While various embodiments of the present invention have been described above, the above description is intended to be illustrative, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A device for accelerating gas replacement in a sealed cabin, characterized in that: The device includes: An airbag is disposed in the sealed cabin, and is provided with an air inlet and an air outlet extending to the outside of the sealed cabin; The replacement inlet and the replacement outlet are arranged on the sealed cabin.

2. The device for accelerating gas replacement in a sealed cabin according to claim 1, characterized in that: One side of the airbag is mounted on the inner wall of the sealed cabin through a mounting plate.

3. The device for accelerating gas replacement in a sealed cabin according to claim 1, characterized in that: The shape of the airbag matches the shape of the inner cavity of the sealed cabin.

4. The device for accelerating gas replacement in a sealed cabin according to claim 1, characterized in that: The air inlet and the air outlet are arranged on the top of the sealed cabin, and flanges and valves are arranged on the air inlet and the air outlet.

5. The device for accelerating gas replacement in a sealed cabin according to claim 1, characterized in that: The replacement inlet and the replacement outlet are respectively arranged at the bottom and the top of the sealed cabin, and the replacement inlet and the replacement outlet are respectively used to connect to an inert gas input pipeline and an inert gas output pipeline.

6. The device for accelerating gas replacement in a sealed cabin according to claim 1, characterized in that: The device further comprises a flow meter for detecting the input flow of the inert gas.

7. The device for accelerating gas replacement in a sealed cabin according to claim 1, characterized in that: It also includes a gas oxygen content detector, which is arranged in the sealed cabin.

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